Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | config MMU |
61d48c2c | 3 | def_bool y |
1da177e4 | 4 | |
66701b14 | 5 | config ZONE_DMA |
69dbb2f7 | 6 | def_bool y |
66701b14 | 7 | |
2fd92273 HC |
8 | config CPU_BIG_ENDIAN |
9 | def_bool y | |
10 | ||
2b105ff9 | 11 | config LOCKDEP_SUPPORT |
61d48c2c | 12 | def_bool y |
2b105ff9 | 13 | |
5bdc9b44 | 14 | config STACKTRACE_SUPPORT |
61d48c2c | 15 | def_bool y |
5bdc9b44 | 16 | |
1da177e4 LT |
17 | config RWSEM_GENERIC_SPINLOCK |
18 | bool | |
19 | ||
20 | config RWSEM_XCHGADD_ALGORITHM | |
61d48c2c | 21 | def_bool y |
1da177e4 | 22 | |
f0d1b0b3 | 23 | config ARCH_HAS_ILOG2_U32 |
6f9a3c33 | 24 | def_bool n |
f0d1b0b3 DH |
25 | |
26 | config ARCH_HAS_ILOG2_U64 | |
6f9a3c33 | 27 | def_bool n |
f0d1b0b3 | 28 | |
7e33db4e | 29 | config GENERIC_HWEIGHT |
61d48c2c | 30 | def_bool y |
7e33db4e | 31 | |
c0007f1a | 32 | config GENERIC_BUG |
6f9a3c33 | 33 | def_bool y if BUG |
c0007f1a | 34 | |
52499f40 HC |
35 | config GENERIC_BUG_RELATIVE_POINTERS |
36 | def_bool y | |
37 | ||
b6b40c53 | 38 | config GENERIC_LOCKBREAK |
6f9a3c33 | 39 | def_bool y if SMP && PREEMPT |
b6b40c53 | 40 | |
402b0862 | 41 | config PGSTE |
6f9a3c33 | 42 | def_bool y if KVM |
402b0862 | 43 | |
6a11f75b AM |
44 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
45 | def_bool y | |
46 | ||
843c48fd JG |
47 | config AUDIT_ARCH |
48 | def_bool y | |
49 | ||
ce816fa8 | 50 | config NO_IOPORT_MAP |
c8717a3d JG |
51 | def_bool y |
52 | ||
53 | config PCI_QUIRKS | |
54 | def_bool n | |
55 | ||
2a0a5b22 | 56 | config ARCH_SUPPORTS_UPROBES |
5a79859a | 57 | def_bool y |
2a0a5b22 | 58 | |
347a8dc3 | 59 | config S390 |
61d48c2c | 60 | def_bool y |
23fefe11 | 61 | select ARCH_BINFMT_ELF_STATE |
21266be9 | 62 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
2b68f6ca | 63 | select ARCH_HAS_ELF_RANDOMIZE |
79962038 | 64 | select ARCH_HAS_FORTIFY_SOURCE |
957e3fac | 65 | select ARCH_HAS_GCOV_PROFILE_ALL |
e1073d1e | 66 | select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA |
907fa061 | 67 | select ARCH_HAS_KCOV |
3010a5ea | 68 | select ARCH_HAS_PTE_SPECIAL |
d2852a22 | 69 | select ARCH_HAS_SET_MEMORY |
47523c98 | 70 | select ARCH_HAS_SG_CHAIN |
ad21fc4f LA |
71 | select ARCH_HAS_STRICT_KERNEL_RWX |
72 | select ARCH_HAS_STRICT_MODULE_RWX | |
c42d8c7d | 73 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
0e0d04a8 | 74 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
75 | select ARCH_INLINE_READ_LOCK |
76 | select ARCH_INLINE_READ_LOCK_BH | |
77 | select ARCH_INLINE_READ_LOCK_IRQ | |
78 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 79 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
80 | select ARCH_INLINE_READ_UNLOCK |
81 | select ARCH_INLINE_READ_UNLOCK_BH | |
82 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
83 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
84 | select ARCH_INLINE_SPIN_LOCK |
85 | select ARCH_INLINE_SPIN_LOCK_BH | |
86 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
87 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
88 | select ARCH_INLINE_SPIN_TRYLOCK | |
89 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
90 | select ARCH_INLINE_SPIN_UNLOCK | |
91 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
92 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
93 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
94 | select ARCH_INLINE_WRITE_LOCK |
95 | select ARCH_INLINE_WRITE_LOCK_BH | |
96 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
97 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 98 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
99 | select ARCH_INLINE_WRITE_UNLOCK |
100 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
101 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
102 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 103 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 104 | select ARCH_SUPPORTS_ATOMIC_RMW |
a763bc8b | 105 | select ARCH_SUPPORTS_NUMA_BALANCING |
295d8fa9 | 106 | select ARCH_USE_BUILTIN_BSWAP |
efc1d23b | 107 | select ARCH_USE_CMPXCHG_LOCKREF |
3f6813b9 | 108 | select ARCH_WANTS_DYNAMIC_TASK_STRUCT |
c42d8c7d | 109 | select ARCH_WANTS_UBSAN_NO_NULL |
c1d7e01d | 110 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
111 | select BUILDTIME_EXTABLE_SORT |
112 | select CLONE_BACKWARDS2 | |
5d6a0163 | 113 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 | 114 | select GENERIC_CLOCKEVENTS |
8f00b3e2 | 115 | select GENERIC_CPU_AUTOPROBE |
0e0d04a8 | 116 | select GENERIC_CPU_DEVICES if !SMP |
d424986f | 117 | select GENERIC_CPU_VULNERABILITIES |
746479cd | 118 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 119 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 120 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 121 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 122 | select HAVE_ARCH_AUDITSYSCALL |
5a79859a | 123 | select HAVE_ARCH_JUMP_LABEL |
fff7fb0b | 124 | select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES |
c63cb468 | 125 | select HAVE_ARCH_SECCOMP_FILTER |
5614dd92 | 126 | select HAVE_ARCH_SOFT_DIRTY |
0e0d04a8 | 127 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 128 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
6077776b | 129 | select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
130 | select HAVE_CMPXCHG_DOUBLE |
131 | select HAVE_CMPXCHG_LOCAL | |
f50c0e63 | 132 | select HAVE_COPY_THREAD_TLS |
0e0d04a8 | 133 | select HAVE_DEBUG_KMEMLEAK |
e1231b0e | 134 | select HAVE_DMA_CONTIGUOUS |
002e6745 | 135 | select DMA_DIRECT_OPS |
5a79859a HC |
136 | select HAVE_DYNAMIC_FTRACE |
137 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
9078a549 | 138 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
0e0d04a8 | 139 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
140 | select HAVE_FUNCTION_GRAPH_TRACER |
141 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 142 | select HAVE_FUTEX_CMPXCHG if FUTEX |
dfd4c493 | 143 | select HAVE_GCC_PLUGINS |
0e0d04a8 HC |
144 | select HAVE_KERNEL_BZIP2 |
145 | select HAVE_KERNEL_GZIP | |
8e2872ce | 146 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
147 | select HAVE_KERNEL_LZMA |
148 | select HAVE_KERNEL_LZO | |
149 | select HAVE_KERNEL_XZ | |
150 | select HAVE_KPROBES | |
151 | select HAVE_KRETPROBES | |
5a79859a | 152 | select HAVE_KVM |
21042d43 | 153 | select HAVE_LIVEPATCH |
c33eff60 HC |
154 | select HAVE_PERF_REGS |
155 | select HAVE_PERF_USER_STACK_DUMP | |
0e0d04a8 HC |
156 | select HAVE_MEMBLOCK |
157 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 158 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 159 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
160 | select HAVE_OPROFILE |
161 | select HAVE_PERF_EVENTS | |
162 | select HAVE_REGS_AND_STACK_ACCESS_API | |
163 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 | 164 | select HAVE_VIRT_CPU_ACCOUNTING |
786d35d4 | 165 | select MODULES_USE_ELF_RELA |
50be6345 | 166 | select NO_BOOTMEM |
7eddd99c | 167 | select OLD_SIGACTION |
93bead43 | 168 | select OLD_SIGSUSPEND3 |
bb98f396 | 169 | select SPARSE_IRQ |
0e0d04a8 | 170 | select SYSCTL_EXCEPTION_TRACE |
d5c352cd | 171 | select THREAD_INFO_IN_TASK |
0563416b | 172 | select TTY |
0e0d04a8 | 173 | select VIRT_CPU_ACCOUNTING |
40565b5a | 174 | select ARCH_HAS_SCALED_CPUTIME |
93bead43 | 175 | select VIRT_TO_BUS |
42a0bb3f | 176 | select HAVE_NMI |
3a368f74 | 177 | |
1da177e4 | 178 | |
fca3e357 | 179 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 180 | def_bool y |
fca3e357 | 181 | |
c81956c9 KS |
182 | config PGTABLE_LEVELS |
183 | int | |
1aea9b3f | 184 | default 5 |
c81956c9 | 185 | |
1da177e4 LT |
186 | source "init/Kconfig" |
187 | ||
dc52ddc0 MH |
188 | source "kernel/Kconfig.freezer" |
189 | ||
21042d43 JS |
190 | source "kernel/livepatch/Kconfig" |
191 | ||
843c48fd JG |
192 | menu "Processor type and features" |
193 | ||
194 | config HAVE_MARCH_Z900_FEATURES | |
195 | def_bool n | |
196 | ||
197 | config HAVE_MARCH_Z990_FEATURES | |
198 | def_bool n | |
199 | select HAVE_MARCH_Z900_FEATURES | |
200 | ||
201 | config HAVE_MARCH_Z9_109_FEATURES | |
202 | def_bool n | |
203 | select HAVE_MARCH_Z990_FEATURES | |
204 | ||
205 | config HAVE_MARCH_Z10_FEATURES | |
206 | def_bool n | |
207 | select HAVE_MARCH_Z9_109_FEATURES | |
208 | ||
209 | config HAVE_MARCH_Z196_FEATURES | |
210 | def_bool n | |
211 | select HAVE_MARCH_Z10_FEATURES | |
212 | ||
991c1505 HC |
213 | config HAVE_MARCH_ZEC12_FEATURES |
214 | def_bool n | |
215 | select HAVE_MARCH_Z196_FEATURES | |
216 | ||
f8b2dcbd MS |
217 | config HAVE_MARCH_Z13_FEATURES |
218 | def_bool n | |
219 | select HAVE_MARCH_ZEC12_FEATURES | |
220 | ||
6997c323 MS |
221 | config HAVE_MARCH_Z14_FEATURES |
222 | def_bool n | |
223 | select HAVE_MARCH_Z13_FEATURES | |
224 | ||
843c48fd JG |
225 | choice |
226 | prompt "Processor type" | |
7072276e | 227 | default MARCH_Z196 |
1da177e4 | 228 | |
843c48fd JG |
229 | config MARCH_Z900 |
230 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 231 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
232 | help |
233 | Select this to enable optimizations for model z800/z900 (2064 and | |
234 | 2066 series). This will enable some optimizations that are not | |
235 | available on older ESA/390 (31 Bit) only CPUs. | |
236 | ||
237 | config MARCH_Z990 | |
238 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 239 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
240 | help |
241 | Select this to enable optimizations for model z890/z990 (2084 and | |
242 | 2086 series). The kernel will be slightly faster but will not work | |
243 | on older machines. | |
244 | ||
245 | config MARCH_Z9_109 | |
246 | bool "IBM System z9" | |
5a79859a | 247 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
248 | help |
249 | Select this to enable optimizations for IBM System z9 (2094 and | |
250 | 2096 series). The kernel will be slightly faster but will not work | |
251 | on older machines. | |
252 | ||
253 | config MARCH_Z10 | |
254 | bool "IBM System z10" | |
5a79859a | 255 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
256 | help |
257 | Select this to enable optimizations for IBM System z10 (2097 and | |
258 | 2098 series). The kernel will be slightly faster but will not work | |
259 | on older machines. | |
260 | ||
261 | config MARCH_Z196 | |
262 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 263 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
264 | help |
265 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
266 | (2818 and 2817 series). The kernel will be slightly faster but will | |
267 | not work on older machines. | |
1da177e4 | 268 | |
991c1505 | 269 | config MARCH_ZEC12 |
59471227 | 270 | bool "IBM zBC12 and zEC12" |
5a79859a | 271 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 272 | help |
59471227 HC |
273 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
274 | 2827 series). The kernel will be slightly faster but will not work on | |
275 | older machines. | |
991c1505 | 276 | |
f8b2dcbd | 277 | config MARCH_Z13 |
bb3aa614 | 278 | bool "IBM z13s and z13" |
5a79859a | 279 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd | 280 | help |
bb3aa614 HC |
281 | Select this to enable optimizations for IBM z13s and z13 (2965 and |
282 | 2964 series). The kernel will be slightly faster but will not work on | |
283 | older machines. | |
f8b2dcbd | 284 | |
6997c323 | 285 | config MARCH_Z14 |
451239eb | 286 | bool "IBM z14 ZR1 and z14" |
6997c323 MS |
287 | select HAVE_MARCH_Z14_FEATURES |
288 | help | |
451239eb HC |
289 | Select this to enable optimizations for IBM z14 ZR1 and z14 (3907 |
290 | and 3906 series). The kernel will be slightly faster but will not | |
291 | work on older machines. | |
6997c323 | 292 | |
843c48fd | 293 | endchoice |
1da177e4 | 294 | |
1db9e051 HC |
295 | config MARCH_Z900_TUNE |
296 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
297 | ||
298 | config MARCH_Z990_TUNE | |
299 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
300 | ||
301 | config MARCH_Z9_109_TUNE | |
302 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
303 | ||
304 | config MARCH_Z10_TUNE | |
305 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
306 | ||
307 | config MARCH_Z196_TUNE | |
308 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
309 | ||
310 | config MARCH_ZEC12_TUNE | |
311 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
312 | ||
f8b2dcbd MS |
313 | config MARCH_Z13_TUNE |
314 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
315 | ||
6997c323 MS |
316 | config MARCH_Z14_TUNE |
317 | def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT | |
318 | ||
1db9e051 HC |
319 | choice |
320 | prompt "Tune code generation" | |
321 | default TUNE_DEFAULT | |
322 | help | |
323 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
324 | This will make the code run faster on the selected machine but | |
325 | somewhat slower on other machines. | |
326 | This option only changes how the compiler emits instructions, not the | |
327 | selection of instructions itself, so the resulting kernel will run on | |
328 | all other machines. | |
329 | ||
330 | config TUNE_DEFAULT | |
331 | bool "Default" | |
332 | help | |
333 | Tune the generated code for the target processor for which the kernel | |
334 | will be compiled. | |
335 | ||
1db9e051 HC |
336 | config TUNE_Z900 |
337 | bool "IBM zSeries model z800 and z900" | |
338 | ||
339 | config TUNE_Z990 | |
340 | bool "IBM zSeries model z890 and z990" | |
341 | ||
342 | config TUNE_Z9_109 | |
343 | bool "IBM System z9" | |
344 | ||
345 | config TUNE_Z10 | |
346 | bool "IBM System z10" | |
347 | ||
348 | config TUNE_Z196 | |
349 | bool "IBM zEnterprise 114 and 196" | |
350 | ||
351 | config TUNE_ZEC12 | |
352 | bool "IBM zBC12 and zEC12" | |
353 | ||
f8b2dcbd MS |
354 | config TUNE_Z13 |
355 | bool "IBM z13" | |
356 | ||
6997c323 MS |
357 | config TUNE_Z14 |
358 | bool "IBM z14" | |
359 | ||
1db9e051 HC |
360 | endchoice |
361 | ||
347a8dc3 | 362 | config 64BIT |
6f9a3c33 | 363 | def_bool y |
d9f7a745 | 364 | |
843c48fd JG |
365 | config COMPAT |
366 | def_bool y | |
367 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
368 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
369 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 370 | select COMPAT_OLD_SIGACTION |
2813893f | 371 | depends on MULTIUSER |
843c48fd JG |
372 | help |
373 | Select this option if you want to enable your system kernel to | |
374 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
375 | (and some other stuff like libraries and such) is needed for | |
376 | executing 31 bit applications. It is safe to say "Y". | |
377 | ||
378 | config SYSVIPC_COMPAT | |
379 | def_bool y if COMPAT && SYSVIPC | |
380 | ||
1da177e4 | 381 | config SMP |
6f9a3c33 MS |
382 | def_bool y |
383 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
384 | ---help--- |
385 | This enables support for systems with more than one CPU. If you have | |
386 | a system with only one CPU, like most personal computers, say N. If | |
387 | you have a system with more than one CPU, say Y. | |
388 | ||
4a474157 | 389 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
390 | machines, but will use only one CPU of a multiprocessor machine. If |
391 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 392 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
393 | will run faster if you say N here. |
394 | ||
03502faa AB |
395 | See also the SMP-HOWTO available at |
396 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
397 | |
398 | Even if you don't know what to do here, say Y. | |
399 | ||
400 | config NR_CPUS | |
5c75a0da HC |
401 | int "Maximum number of CPUs (2-512)" |
402 | range 2 512 | |
1da177e4 | 403 | depends on SMP |
5a79859a | 404 | default "64" |
1da177e4 LT |
405 | help |
406 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 407 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
408 | minimum value which makes sense is 2. |
409 | ||
410 | This is purely to save memory - each supported CPU adds | |
411 | approximately sixteen kilobytes to the kernel image. | |
412 | ||
413 | config HOTPLUG_CPU | |
6f9a3c33 MS |
414 | def_bool y |
415 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 416 | depends on SMP |
1da177e4 LT |
417 | help |
418 | Say Y here to be able to turn CPUs off and on. CPUs | |
419 | can be controlled through /sys/devices/system/cpu/cpu#. | |
420 | Say N if you want to disable CPU hotplug. | |
421 | ||
3a368f74 PH |
422 | # Some NUMA nodes have memory ranges that span |
423 | # other nodes. Even though a pfn is valid and | |
424 | # between a node's start and end pfns, it may not | |
425 | # reside on that node. See memmap_init_zone() | |
426 | # for details. <- They meant memory holes! | |
427 | config NODES_SPAN_OTHER_NODES | |
428 | def_bool NUMA | |
429 | ||
430 | config NUMA | |
431 | bool "NUMA support" | |
c095a949 | 432 | depends on SMP && SCHED_TOPOLOGY |
3a368f74 PH |
433 | default n |
434 | help | |
435 | Enable NUMA support | |
436 | ||
437 | This option adds NUMA support to the kernel. | |
438 | ||
439 | An operation mode can be selected by appending | |
440 | numa=<method> to the kernel command line. | |
441 | ||
442 | The default behaviour is identical to appending numa=plain to | |
443 | the command line. This will create just one node with all | |
444 | available memory and all CPUs in it. | |
445 | ||
446 | config NODES_SHIFT | |
447 | int "Maximum NUMA nodes (as a power of 2)" | |
448 | range 1 10 | |
449 | depends on NUMA | |
450 | default "4" | |
451 | help | |
452 | Specify the maximum number of NUMA nodes available on the target | |
453 | system. Increases memory reserved to accommodate various tables. | |
454 | ||
c29a7baf MH |
455 | menu "Select NUMA modes" |
456 | depends on NUMA | |
457 | ||
458 | config NUMA_EMU | |
459 | bool "NUMA emulation" | |
460 | default y | |
461 | help | |
462 | Numa emulation mode will split the available system memory into | |
463 | equal chunks which then are distributed over the configured number | |
464 | of nodes in a round-robin manner. | |
465 | ||
466 | The number of fake nodes is limited by the number of available memory | |
467 | chunks (i.e. memory size / fake size) and the number of supported | |
468 | nodes in the kernel. | |
469 | ||
470 | The CPUs are assigned to the nodes in a way that partially respects | |
471 | the original machine topology (if supported by the machine). | |
472 | Fair distribution of the CPUs is not guaranteed. | |
473 | ||
474 | config EMU_SIZE | |
475 | hex "NUMA emulation memory chunk size" | |
476 | default 0x10000000 | |
477 | range 0x400000 0x100000000 | |
478 | depends on NUMA_EMU | |
479 | help | |
480 | Select the default size by which the memory is chopped and then | |
481 | assigned to emulated NUMA nodes. | |
482 | ||
483 | This can be overridden by specifying | |
484 | ||
485 | emu_size=<n> | |
486 | ||
487 | on the kernel command line where also suffixes K, M, G, and T are | |
488 | supported. | |
489 | ||
490 | endmenu | |
9236b4dd HC |
491 | |
492 | config SCHED_SMT | |
493 | def_bool n | |
c29a7baf | 494 | |
8d11e021 | 495 | config SCHED_MC |
83a24e32 | 496 | def_bool n |
8d11e021 | 497 | |
4cb14bc8 | 498 | config SCHED_BOOK |
10ad34bc MS |
499 | def_bool n |
500 | ||
adac0f1e HC |
501 | config SCHED_DRAWER |
502 | def_bool n | |
503 | ||
10ad34bc | 504 | config SCHED_TOPOLOGY |
6f9a3c33 | 505 | def_bool y |
10ad34bc | 506 | prompt "Topology scheduler support" |
83a24e32 | 507 | depends on SMP |
10ad34bc | 508 | select SCHED_SMT |
83a24e32 | 509 | select SCHED_MC |
10ad34bc | 510 | select SCHED_BOOK |
adac0f1e | 511 | select SCHED_DRAWER |
4cb14bc8 | 512 | help |
10ad34bc MS |
513 | Topology scheduler support improves the CPU scheduler's decision |
514 | making when dealing with machines that have multi-threading, | |
515 | multiple cores or multiple books. | |
4cb14bc8 | 516 | |
843c48fd JG |
517 | source kernel/Kconfig.preempt |
518 | ||
843c48fd | 519 | source kernel/Kconfig.hz |
1da177e4 | 520 | |
bdea9f6f PR |
521 | config KEXEC |
522 | def_bool y | |
523 | select KEXEC_CORE | |
524 | ||
525 | config KEXEC_FILE | |
526 | bool "kexec file based system call" | |
527 | select KEXEC_CORE | |
528 | select BUILD_BIN2C | |
529 | depends on CRYPTO | |
530 | depends on CRYPTO_SHA256 | |
531 | depends on CRYPTO_SHA256_S390 | |
532 | help | |
533 | Enable the kexec file based system call. In contrast to the normal | |
534 | kexec system call this system call takes file descriptors for the | |
535 | kernel and initramfs as arguments. | |
536 | ||
537 | config ARCH_HAS_KEXEC_PURGATORY | |
538 | def_bool y | |
539 | depends on KEXEC_FILE | |
540 | ||
4c637cd8 HF |
541 | config ARCH_RANDOM |
542 | def_bool y | |
543 | prompt "s390 architectural random number generation API" | |
544 | help | |
545 | Enable the s390 architectural random number generation API | |
546 | to provide random data for all consumers within the Linux | |
547 | kernel. | |
548 | ||
549 | When enabled the arch_random_* functions declared in linux/random.h | |
550 | are implemented. The implementation is based on the s390 CPACF | |
551 | instruction subfunction TRNG which provides a real true random | |
552 | number generator. | |
553 | ||
554 | If unsure, say Y. | |
555 | ||
d768bd89 MS |
556 | config KERNEL_NOBP |
557 | def_bool n | |
558 | prompt "Enable modified branch prediction for the kernel by default" | |
559 | help | |
560 | If this option is selected the kernel will switch to a modified | |
561 | branch prediction mode if the firmware interface is available. | |
562 | The modified branch prediction mode improves the behaviour in | |
563 | regard to speculative execution. | |
564 | ||
565 | With the option enabled the kernel parameter "nobp=0" or "nospec" | |
566 | can be used to run the kernel in the normal branch prediction mode. | |
567 | ||
568 | With the option disabled the modified branch prediction mode is | |
569 | enabled with the "nobp=1" kernel parameter. | |
570 | ||
571 | If unsure, say N. | |
572 | ||
f19fbd5e MS |
573 | config EXPOLINE |
574 | def_bool n | |
575 | prompt "Avoid speculative indirect branches in the kernel" | |
576 | help | |
577 | Compile the kernel with the expoline compiler options to guard | |
578 | against kernel-to-user data leaks by avoiding speculative indirect | |
579 | branches. | |
580 | Requires a compiler with -mindirect-branch=thunk support for full | |
581 | protection. The kernel may run slower. | |
582 | ||
583 | If unsure, say N. | |
584 | ||
585 | choice | |
586 | prompt "Expoline default" | |
587 | depends on EXPOLINE | |
588 | default EXPOLINE_FULL | |
589 | ||
590 | config EXPOLINE_OFF | |
591 | bool "spectre_v2=off" | |
592 | ||
6e179d64 | 593 | config EXPOLINE_AUTO |
f19fbd5e MS |
594 | bool "spectre_v2=auto" |
595 | ||
596 | config EXPOLINE_FULL | |
597 | bool "spectre_v2=on" | |
598 | ||
599 | endchoice | |
600 | ||
843c48fd | 601 | endmenu |
1da177e4 | 602 | |
843c48fd | 603 | menu "Memory setup" |
1d057720 | 604 | |
843c48fd | 605 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 606 | def_bool y |
843c48fd JG |
607 | select SPARSEMEM_VMEMMAP_ENABLE |
608 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 609 | |
843c48fd JG |
610 | config ARCH_SPARSEMEM_DEFAULT |
611 | def_bool y | |
1da177e4 | 612 | |
843c48fd JG |
613 | config ARCH_SELECT_MEMORY_MODEL |
614 | def_bool y | |
1da177e4 | 615 | |
843c48fd JG |
616 | config ARCH_ENABLE_MEMORY_HOTPLUG |
617 | def_bool y if SPARSEMEM | |
0efa4703 | 618 | |
843c48fd JG |
619 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
620 | def_bool y | |
e37f50e1 | 621 | |
ec66ad66 MS |
622 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
623 | def_bool y | |
ec66ad66 | 624 | |
843c48fd JG |
625 | config FORCE_MAX_ZONEORDER |
626 | int | |
627 | default "9" | |
f861e405 | 628 | |
843c48fd | 629 | source "mm/Kconfig" |
1da177e4 | 630 | |
b8402b95 HC |
631 | config MAX_PHYSMEM_BITS |
632 | int "Maximum size of supported physical memory in bits (42-53)" | |
633 | range 42 53 | |
634 | default "46" | |
635 | help | |
636 | This option specifies the maximum supported size of physical memory | |
637 | in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB). | |
638 | Increasing the number of bits also increases the kernel image size. | |
639 | By default 46 bits (64TB) are supported. | |
640 | ||
1da177e4 | 641 | config PACK_STACK |
6f9a3c33 MS |
642 | def_bool y |
643 | prompt "Pack kernel stack" | |
1da177e4 LT |
644 | help |
645 | This option enables the compiler option -mkernel-backchain if it | |
646 | is available. If the option is available the compiler supports | |
647 | the new stack layout which dramatically reduces the minimum stack | |
648 | frame size. With an old compiler a non-leaf function needs a | |
649 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
650 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
651 | and 24 byte on 64 bit. | |
652 | ||
653 | Say Y if you are unsure. | |
654 | ||
1da177e4 | 655 | config CHECK_STACK |
6f9a3c33 MS |
656 | def_bool y |
657 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
658 | help |
659 | This option enables the compiler option -mstack-guard and | |
660 | -mstack-size if they are available. If the compiler supports them | |
661 | it will emit additional code to each function prolog to trigger | |
662 | an illegal operation if the kernel stack is about to overflow. | |
663 | ||
664 | Say N if you are unsure. | |
665 | ||
666 | config STACK_GUARD | |
667 | int "Size of the guard area (128-1024)" | |
668 | range 128 1024 | |
669 | depends on CHECK_STACK | |
670 | default "256" | |
671 | help | |
672 | This allows you to specify the size of the guard area at the lower | |
673 | end of the kernel stack. If the kernel stack points into the guard | |
674 | area on function entry an illegal operation is triggered. The size | |
675 | needs to be a power of 2. Please keep in mind that the size of an | |
676 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
677 | The minimum size for the stack guard should be 256 for 31 bit and | |
678 | 512 for 64 bit. | |
679 | ||
2c190da4 | 680 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 681 | def_bool n |
2c190da4 | 682 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 683 | help |
2c190da4 JG |
684 | This option enables the compiler option -mwarn-dynamicstack. If the |
685 | compiler supports this options generates warnings for functions | |
686 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
687 | |
688 | Say N if you are unsure. | |
689 | ||
843c48fd | 690 | endmenu |
3f22ab27 | 691 | |
843c48fd | 692 | menu "I/O subsystem" |
1da177e4 | 693 | |
1da177e4 | 694 | config QDIO |
6f9a3c33 MS |
695 | def_tristate y |
696 | prompt "QDIO support" | |
1da177e4 | 697 | ---help--- |
8129ee16 | 698 | This driver provides the Queued Direct I/O base support for |
efca13bc | 699 | IBM System z. |
1da177e4 LT |
700 | |
701 | To compile this driver as a module, choose M here: the | |
702 | module will be called qdio. | |
703 | ||
704 | If unsure, say Y. | |
705 | ||
c8717a3d JG |
706 | menuconfig PCI |
707 | bool "PCI support" | |
c8717a3d | 708 | select PCI_MSI |
a4ce5a48 | 709 | select IOMMU_HELPER |
8128f23c | 710 | select IOMMU_SUPPORT |
f616ab59 | 711 | select NEED_DMA_MAP_STATE |
86596f0a | 712 | select NEED_SG_DMA_LENGTH |
a4ce5a48 | 713 | |
c8717a3d JG |
714 | help |
715 | Enable PCI support. | |
716 | ||
717 | if PCI | |
718 | ||
719 | config PCI_NR_FUNCTIONS | |
720 | int "Maximum number of PCI functions (1-4096)" | |
721 | range 1 4096 | |
b18601b0 | 722 | default "128" |
c8717a3d JG |
723 | help |
724 | This allows you to specify the maximum number of PCI functions which | |
725 | this kernel will support. | |
726 | ||
727 | source "drivers/pci/Kconfig" | |
c8717a3d JG |
728 | |
729 | endif # PCI | |
730 | ||
731 | config PCI_DOMAINS | |
732 | def_bool PCI | |
733 | ||
734 | config HAS_IOMEM | |
735 | def_bool PCI | |
736 | ||
9d92a7e1 | 737 | config CHSC_SCH |
d9c11b1e | 738 | def_tristate m |
6f9a3c33 | 739 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
740 | help |
741 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
742 | is usually present on LPAR only. | |
743 | The driver creates a device /dev/chsc, which may be used to | |
744 | obtain I/O configuration information about the machine and | |
745 | to issue asynchronous chsc commands (DANGEROUS). | |
746 | You will usually only want to use this interface on a special | |
747 | LPAR designated for system management. | |
748 | ||
749 | To compile this driver as a module, choose M here: the | |
750 | module will be called chsc_sch. | |
751 | ||
752 | If unsure, say N. | |
753 | ||
1d1c8f78 SO |
754 | config SCM_BUS |
755 | def_bool y | |
1d1c8f78 SO |
756 | prompt "SCM bus driver" |
757 | help | |
758 | Bus driver for Storage Class Memory. | |
759 | ||
eadb86ab SO |
760 | config EADM_SCH |
761 | def_tristate m | |
762 | prompt "Support for EADM subchannels" | |
763 | depends on SCM_BUS | |
764 | help | |
765 | This driver allows usage of EADM subchannels. EADM subchannels act | |
766 | as a communication vehicle for SCM increments. | |
767 | ||
768 | To compile this driver as a module, choose M here: the | |
769 | module will be called eadm_sch. | |
770 | ||
63f1934d DJS |
771 | config VFIO_CCW |
772 | def_tristate n | |
773 | prompt "Support for VFIO-CCW subchannels" | |
84cd8fc4 | 774 | depends on S390_CCW_IOMMU && VFIO_MDEV |
63f1934d DJS |
775 | help |
776 | This driver allows usage of I/O subchannels via VFIO-CCW. | |
777 | ||
778 | To compile this driver as a module, choose M here: the | |
779 | module will be called vfio_ccw. | |
780 | ||
843c48fd JG |
781 | endmenu |
782 | ||
783 | menu "Dump support" | |
784 | ||
785 | config CRASH_DUMP | |
786 | bool "kernel crash dumps" | |
5a79859a | 787 | depends on SMP |
843c48fd JG |
788 | select KEXEC |
789 | help | |
790 | Generate crash dump after being started by kexec. | |
791 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
792 | into a specially reserved region and then later executed after | |
793 | a crash by kdump/kexec. | |
843c48fd | 794 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
795 | This option also enables s390 zfcpdump. |
796 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
797 | |
798 | endmenu | |
799 | ||
800 | menu "Executable file formats / Emulations" | |
1da177e4 | 801 | |
1da177e4 LT |
802 | source "fs/Kconfig.binfmt" |
803 | ||
843c48fd JG |
804 | config SECCOMP |
805 | def_bool y | |
806 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
807 | depends on PROC_FS | |
808 | help | |
809 | This kernel feature is useful for number crunching applications | |
810 | that may need to compute untrusted bytecode during their | |
811 | execution. By using pipes or other transports made available to | |
812 | the process as file descriptors supporting the read/write | |
813 | syscalls, it's possible to isolate those applications in | |
814 | their own address space using seccomp. Once seccomp is | |
815 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
816 | and the task is only allowed to execute a few safe syscalls | |
817 | defined by each seccomp mode. | |
818 | ||
819 | If unsure, say Y. | |
820 | ||
821 | endmenu | |
822 | ||
823 | menu "Power Management" | |
824 | ||
825 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 826 | def_bool y |
843c48fd JG |
827 | |
828 | source "kernel/power/Kconfig" | |
829 | ||
830 | endmenu | |
831 | ||
832 | source "net/Kconfig" | |
833 | ||
834 | config PCMCIA | |
835 | def_bool n | |
836 | ||
837 | config CCW | |
838 | def_bool y | |
839 | ||
840 | source "drivers/Kconfig" | |
841 | ||
b6ef86e9 UB |
842 | config HAVE_PNETID |
843 | tristate | |
844 | default (SMC || CCWGROUP) | |
845 | ||
843c48fd JG |
846 | source "fs/Kconfig" |
847 | ||
848 | source "arch/s390/Kconfig.debug" | |
849 | ||
850 | source "security/Kconfig" | |
851 | ||
852 | source "crypto/Kconfig" | |
853 | ||
854 | source "lib/Kconfig" | |
855 | ||
856 | menu "Virtualization" | |
684de39b | 857 | |
1da177e4 | 858 | config PFAULT |
6f9a3c33 MS |
859 | def_bool y |
860 | prompt "Pseudo page fault support" | |
1da177e4 LT |
861 | help |
862 | Select this option, if you want to use PFAULT pseudo page fault | |
863 | handling under VM. If running native or in LPAR, this option | |
864 | has no effect. If your VM does not support PFAULT, PAGEEX | |
865 | pseudo page fault handling will be used. | |
866 | Note that VM 4.2 supports PFAULT but has a bug in its | |
867 | implementation that causes some problems. | |
868 | Everybody who wants to run Linux under VM != VM4.2 should select | |
869 | this option. | |
870 | ||
1da177e4 | 871 | config CMM |
6f9a3c33 MS |
872 | def_tristate n |
873 | prompt "Cooperative memory management" | |
1da177e4 LT |
874 | help |
875 | Select this option, if you want to enable the kernel interface | |
876 | to reduce the memory size of the system. This is accomplished | |
877 | by allocating pages of memory and put them "on hold". This only | |
878 | makes sense for a system running under VM where the unused pages | |
879 | will be reused by VM for other guest systems. The interface | |
880 | allows an external monitor to balance memory of many systems. | |
881 | Everybody who wants to run Linux under VM should select this | |
882 | option. | |
883 | ||
1da177e4 | 884 | config CMM_IUCV |
6f9a3c33 MS |
885 | def_bool y |
886 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
887 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
888 | help | |
889 | Select this option to enable the special message interface to | |
890 | the cooperative memory management. | |
891 | ||
1da177e4 | 892 | config APPLDATA_BASE |
6f9a3c33 MS |
893 | def_bool n |
894 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 895 | depends on PROC_FS |
1da177e4 LT |
896 | help |
897 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
898 | monitor records. The monitor records are updated at certain time | |
899 | intervals, once the timer is started. | |
900 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
901 | i.e. enables or disables monitoring on the Linux side. | |
902 | A custom interval value (in seconds) can be written to | |
903 | /proc/appldata/interval. | |
904 | ||
905 | Defaults are 60 seconds interval and timer off. | |
906 | The /proc entries can also be read from, showing the current settings. | |
907 | ||
908 | config APPLDATA_MEM | |
6f9a3c33 MS |
909 | def_tristate m |
910 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 911 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
912 | help |
913 | This provides memory management related data to the Linux - VM Monitor | |
914 | Stream, like paging/swapping rate, memory utilisation, etc. | |
915 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
916 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
917 | on the z/VM side. | |
918 | ||
919 | Default is disabled. | |
920 | The /proc entry can also be read from, showing the current settings. | |
921 | ||
922 | This can also be compiled as a module, which will be called | |
923 | appldata_mem.o. | |
924 | ||
925 | config APPLDATA_OS | |
6f9a3c33 MS |
926 | def_tristate m |
927 | prompt "Monitor OS statistics" | |
1da177e4 LT |
928 | depends on APPLDATA_BASE |
929 | help | |
930 | This provides OS related data to the Linux - VM Monitor Stream, like | |
931 | CPU utilisation, etc. | |
932 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
933 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
934 | on the z/VM side. | |
935 | ||
936 | Default is disabled. | |
937 | This can also be compiled as a module, which will be called | |
938 | appldata_os.o. | |
939 | ||
940 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
941 | def_tristate m |
942 | prompt "Monitor overall network statistics" | |
70193af9 | 943 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
944 | help |
945 | This provides network related data to the Linux - VM Monitor Stream, | |
946 | currently there is only a total sum of network I/O statistics, no | |
947 | per-interface data. | |
948 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
949 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
950 | on the z/VM side. | |
951 | ||
952 | Default is disabled. | |
953 | This can also be compiled as a module, which will be called | |
954 | appldata_net_sum.o. | |
955 | ||
24bbb1fa | 956 | config S390_HYPFS_FS |
6f9a3c33 MS |
957 | def_bool y |
958 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 959 | select SYS_HYPERVISOR |
24bbb1fa MH |
960 | help |
961 | This is a virtual file system intended to provide accounting | |
962 | information in an s390 hypervisor environment. | |
963 | ||
843c48fd | 964 | source "arch/s390/kvm/Kconfig" |
411ed322 | 965 | |
fa587743 | 966 | config S390_GUEST |
6f9a3c33 | 967 | def_bool y |
510cf5a6 | 968 | prompt "s390 support for virtio devices" |
79b6f7fb | 969 | select TTY |
80629b0b | 970 | select VIRTUALIZATION |
fa587743 | 971 | select VIRTIO |
faeba830 | 972 | select VIRTIO_CONSOLE |
fa587743 | 973 | help |
bdd1fc27 CH |
974 | Enabling this option adds support for virtio based paravirtual device |
975 | drivers on s390. | |
1da177e4 | 976 | |
20766c08 | 977 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 978 | the KVM hypervisor. |
155af2f9 HJP |
979 | |
980 | endmenu |